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Measuring the length of a second might seem simple, but this history of the time unit from TED-Ed shows how the road to the modern, standardised second was anything but. Written by John Kitching, a Fellow at the US National Institute of Standards and Technology, the video details how the advent of global communications and transit systems left the world in need of a more precise and universal understanding of a second – and how that search ultimately led to the atomic clock.
Video by TED-Ed
Director: Tjoff Koong
Writer: John Kitching
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Nature and landscape
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Design and fashion
The mundane becomes mesmerising in this deep dive into segmented displays
A song of ice, fire and jelly – exploring the physics and history of the trumpet
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Thinkers and theories
Photographs offer a colonialist window to the past – one that must be challenged
Animals and humans
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